Spring-camming machine



May 14 1929- J. w. KILLINGswoRTl-l 1,713,387

SPRING CAMMING MACHINE Filed March 21, 1927 2 Sheets-Sheet l ,fu ATTORNEY.

Patented May 14, 1929.

UNITED STATES PATENT OFFICE.

SPRING-CAMMING MACHINE Application led March 21, 1927. Serial No. 177,179.

This invention relates to a spring camming machine and has for its object to provide, in a manner as hereinafter set forth, a machine of such class for efficiently camming springs of the laminated type, but it is to be understood that a machine in accordance with this invention, can be employed for any purposes for which it is found applicable.

A further object of the invention is to provide, in a manner as hereinafter set forth, a-

tively simple in its construction and arrangement, strong, durable, compact, adjustable, thoroughly efficient in its use, readily assembled, and comparatively inexpensive to set up. I

With the foregoing and other objects in view the invention consists of the novel construction, combination and arrangement of parts, as hereinafter more specifically described and illustrated in the accompanying drawings, wherein shown an embodiment of the invention, but it is to be understood that changes, variations and modications can be resorted to which fall within the scope of the claims hereunto appended.

In the drawings wherein like reference characters denote corresponding parts throughout the several views:

Figure 1 is a top plan view of a spring camming machine in accordance with this invention. l

Figiiire 2'is a front elevation thereof.

Figure 3 is an end View.

Figure 4 is a fragmentary view in cross section.

Figure 5 is a top plan view, upon a reduced scale, of the table or platform.

Figure 6 is a perspective view of one of the adjustable abutments.

Referring to the drawings in detail 1 denotes a rectangular table top or platform provided with a depending edge flange 2 which is coextensive therewith. The top 1- in prox'- imity to its forward side edge and each end edge is formed with an opening and said openings are indicated at 3, 1. The top 1 in proximity' to its rear edge and at each side of its transverse median is provided with an opening and said openings are indicated at 5, G. The top 1 adjacent its rear edge and in proximity to each end edge is formed with a group of openings and the said groups are indicated at 7, 8. Arranged at the longitudinal center of the top 1 is a pair of spaced lengthwise extending slots 9, 10. Each slot extends from a point at one side of the transverse mediano the top and terminates at a point adjacent an end edge of the top. Formed integral with the lower face of the top 1, at the transverse median thereof is a web 11 of rectangular cross section and which extends from the rear to the front flange 2. The web 11 at the front of the table 1 merges into a supporting arm 12 which projects for wardly of the front of the top 1V a substantial distance and is of rectangular cross section.

The arm 12 is formed near each side edge with set of spaced openings 13. The arm 12 is positioned below the flange A2 at the front of the table top 1. The openings 5, 6 extend through the web 11. Secured against the lower face of the top 1 in proximity to the end kflanges 2 are' supporting standards 14 of skeleton form, and each is provided at its bottom with a pair of flanges 15 throuffh which extend holdfast devices 16 for iixedly securing the standards stationary. Each standard consists of an inverted yoke shaped portion 17 provided with a brace 18 which is integralwith the top of the body portion 17 and also with the arms thereof. The means for securing the standards 14 to the top l will be presently referred to.

Positioned upon the upper face of the top 1 in proximity to the ends thereof, are end brackets 19 of inverted U-shape and each of which is formed at its lower end with a pair of lateral iianges 20, through which extend holdfast devices 21 for fixedly securing the brackets in position. The holdfast devices 21 at the rear of the bracket 20, extend through one of the openings of each group 7 andy 8 and also through the top of the body portion 17 of the standards 14. The holdfast devices 21 at the outer end of the brackets 19 extend through the openings 3 and 4 and also through the body portion 17 of the standard 14. Mounted upon the upper ends of the brackets 19, centrally thereof, and disthe extension is a cylindrical supporting member in the form of a pipe and which is v disposed longitudinally with respect to the table top as well as being arranged a substantial distance thereabove. Adjustably mounted on the support 27 is a pair of abut-- ment blocks 28, which are vertically disposed, are slidably mounted in the slots 9, 10- extend above the brackets 19and bear against the frontside of the stop V22. Each block 8 is provided with a rearward extension 29,.

formed with an opening through which extends the support 27. rlhe blocks 28 or rather abutments 28 are adjustable relativelyv to each other upon the support 27. T he ends of the slots 9, 10 limit theadjusting movement K of the abutments 28 in either. direction.

Arranged on the top 1,. in proximity to each of the brackets 19, is a tensioning element for the flexible camn'iing element. Each tensioning element is in the forni of a half elliptic spring. The tensioning elements are indicated at 31, 32, and have their rear or larger ends connected to yolres 33, which are fixedly secured by the holdfast devices 34 to the table top. One of the holdfast devices 34l extends through one of the openings of the group 7 and the other holdfast device 34 through one of the openings of the group 8. Associated with each tensioning element is a set screw 35, carried by a bracket 36, which is fixedly secured to the table top by holdfast devices and the holdfast devices for the brackets extend through another opening of the groups 7 and 8. The set screws 35 are oppositely disposed with respect to each other and this arrangment also applies to the tension-.ing elements 31, 32. The tensioning elements project forwardly with respect to the stop 22and abutments 28.

The flexible camming element is arranged longitudinally with respectto the table top 1 and forward of the slots 9, 10. The flexible camming element-has its ends connected to the forward ends of the tensioning elements 31 and 32 and said flexible camming element is referred to generally by the reference character 37.- The element 37 is fori ied of a series of interengaging, upstanding, intermediate, oppositely disposed units 38 constructed of steel: and each having one face provided with a lengthwise extending dovetailed groove 39. .The said element 37 further includes a pair of upstanding end members 40, 41, constructed: from1 a steelV plate and each having the outerend thereof formed with a igiene? pair of spaced barrels 42, 43. and its inner` end with an L-shaped flange 44 engaging in an outer unit of the intermediate units of the element 37. The outer enclsof the tensioning elements31, 32 are provided with barrels 45 arranged' between the barrels 42, 43. The bar rels of the tensioning elements 31, 32 aline with the barrels of the end unit or members 40, 41 of the camming element 37. The alining barrels are connectedtogether by a pivot bolt 46 carrying a securing nut 4.7. y1`he end portion or end units 40, 41 are of greater width than the width of the units of the intermediate portion of the element 37. The normal position of the camming element 37 is as shown in Figure 1. Y y

Opposing, arranger.L forwardly of and spaced from the camming element 37, is a fluid pressure operated camming element or shoe 48 of segmental contour and which forms the head of a plunger 49v operated .by a fluid pressure actuated shifting device 50 therefor. The plunger 49 extends into the device 50 and is operated by the piston thereof, thev latter not being shown. A fluid pressure supply pipe 51 isprovided for the device 50and said pipe 51 carries a cut-off 52. The device 51 is v mounted on the supporting arm 12 and. isfixedly secured therewith by the holdfast devices 53. rlhe device 50 carries a rearwardly extending guiding means 54 for the plunger 49.

Mounted upon the top 1, at the transverse center thereof is a vertically disposed bloclr 55, provided with an opening 56 formed with threaded walls. The opening 56 is arranged transversely with respectto the table top 1. The block 55 at its bottom is formed with oppositely extending flanges 57, through which extend holdfast devices 58 for fixedly securing the block to the table top. rlhe holdfast devices extend through the openings 5 and (3 and also through the web 11. Threadably engaging with the wall of the opening 56 is an adjusting rod 59 provided at its outer end with a hand wheel 60 for the purpose of revolving it. The inner end of the rod 59 carries an abutment 61, which is disposed at the transversemedian of the table top and is arranged in alinement with the camming element or shoe 48, but is spaced. rearwardly with respect thereto and also rearwardly with respect to the element. 37, but is disposed centrally with respect to the latter. The abutlent 61 provides means for limiting the inward movement of the central part of the intermediate portion of the camming element 37. /Jhen the cammingelement 37 is shifted rearwardly, it bends on the abutments 28. rlhe position of the .spring to be caninied relative to the elements 37 and'48 is shown in dotted lines andindicated at 62, Figure 1.

The semi-elliptic springs 31, 32, whichform the tensioning elements for the camming element 37, )rovide for a high degree of tension for the camming element 37, whereby when the elements 37 coact with the element 4S, a thoroughly satisfactory camining of the spring is had due to the f'act that the spring cannot move quickly rearwardly during the bending action owing to the fact that the element 37 is highly tensioned. The manner of setting up the intermediate units 38 in constantially what may beter-med an indestructible camming element 37. The screws 35 provide for the setting of the elements 31, 32 the desired manner and the adj ustability of the abutments 28 enable the operator to set the bow in the spring the desired length, and further the abutment 61 will provide for the desired depth of bow or cam with respect to the spring.

It is thought the many advantages of a spring camming machine in accordance with this invention can be readily understood, and although the preferred embodiment of the invention is as illustrated and described, yet it is to be understood that changes in the details of construction can be had which will fall withinv the scope ofl the invention as claimed.

lVhat I claim is:

1. In a spring camming machine a flexible camming element consisting of an intermediate portion and a pair of end portions, said intermediate portion formed of a series of upstanding units each provided on one face with a dove-tail groove, said units being op` V positely disposed and interengagin g with each other, and cach of' said end portions having one end provided with means interengaging with an outer unit of the intermediate portion and its other end provided with means for connection with a tensioning element therefor.

ln a spring camming machine a flexible camming clement, a pair of oppositely disposed horizontally extending semi-elliptical springs providing tensioning elements for the cannning element and each having its inner end anchored and its outer end pivotally connected directly to one end of the camming element,V and setting means for and at the inner side of each of' said tensioning elements.

3.1n a spring camming machine a fluid pressure operated camming shoe, a flexible camming element arranged rearwardly of and coacting with said shoe to cam the spring, and a pair ot horizontally disposed spaced semi-elliptic springs, each having its outer end pivotally connected to one end of the camming element, and a stationary anchoring means for each spring, each of said springs having its rear end fixedly secured to an anchoring means.

4. In a spring camming machine a fluid pressure operated camming shoe, a flexible can'nning element arranged rearwardly of and coacting with said shoe to cam the spring, and further of greater length than the length Yabutment arranged fable abutments nection with the outer units 40, 41 form subof theshoe, a pair of spaced semi-elliptic springs, each having its outer end connected to one end of the camming element and its rear end anchored, a pair of slidably adjustable abutments for and arranged rearwardly of saidcamming element, and an adjustable rearwardly of the slidand disposed centrally with respect to and rearwardly of the camming element.

-5. In a spring camming machine a fluid pressure operated camming shoe, a flexible cumming element arranged rearwardly of and coacting with said shoe to cam the spring, and further of greater length than the length of the shoe, springs, each having its outer end connected to one end of the camming element and its rear end anchored, a pair of slidably adjustable abutments for and arranged rearwardlv of said camming element, an adjustable element arranged rearwardly of the slidable abutments and disposed centrally with respect to and rearwardly of the camming element, supporting means for said slidable abutments,'and a sto for and positioned rearwardly of said slidalile abutments.

6. A camming machine comprising a table formed with a pair of slots, a fluid pressure operated camming shoe supported from and over said table, a flexible camming element positioned over the table, arranged rearwardly of and coacting with said shoe to cam the spring, a pair of spaced semi-elliptic springs arranged over the table and each having its outer end connected with one end of the camming element and its rear end anchored to the table, a pair of slidably adjustable abutments extending into said slots and arranged rearwardly of and for said camming element, a stop for and abutments arranged rearwardly thereof, means mounted on the table for supporting said stop, andan adjustable abutment mounted on the table, positioned between said slidable abutments and further arranged rearwardly of and centrally with respect to said camming element 7. A camming machine comprising a table formed with a pair of slots, a fluid pressure operated camming shoe supported from and over said table, a flexible camming element of belt like form positioned over the table, arranged rearwardly of and coacting with said shoe to cam the spring, a pair of spaced semi-elliptical springs arranged over the table and each having its outer end connected with one end of the camming element and its rear end anchored to the table, a pair of slidably adjustable abutments extending into said slots and arranged rearwardly of and for said camming element, a stop for said abutments arranged rearwardly thereof, means mounted on the table for supporting said stop, an adjustable abutment mounted on the table, positioned between said slidable a pair of spaced semi-elliptic ahu'tments and further arranged rearwardly of and centrally with lrespect to said cammingl element, andy setting means for said seiniLellipti-'c springs arranged rearwardly of said adjustable ahntments;

8. In a spring' camniing machine' a iex-v ilole' eamining element, a platform arranged thereoelow, a pair of eppositely disposed horizontally' extending semi-elliptical springs standing on a longitudinal edge thereof and providing. tension elements for the camming element, each'y of said springsliaving itsinn'er end free of movement and anchored to: said platform and its outer end extending. into f Vone end of thev camming element, and pivot bolts between the ends of the eamining element and thev outer ends of said springs.

9i. In a spring camming machine a flexible eainming. element,- a platforn'i arranged tlierehelow, a pai-r' of oppos'itely disposed horizontally extendingsemi-ellip tical-springs standing on a longitudinal edge thereof and providing tension elements for the camming element, each of said springs having its inner end anchored to sai-i'dl platform and its outer end extendlii'ig into one end of the carn- Y ming eleinent,.pi.'fot bolts between the ends of the camming` element andy the outer ends of said springs, and" setting'. means for said tensioning; elements, saidineans positioned at the inner side and forwardly of the inner endsof said elements.

1.50. Inr av springA eamining inaehine a fiere iblecan'nning eleinent,a pair of horizontally disposed semi elliptic springs providing: tensioning elements for thecain'ining element,

and each of vsaid tensioning elements having the innerendf thereof anehored and its outer end extendingi into one' end of the caminnig element7 and pivot bolts between theV endsof the caniining. element and: thel outer ends of said springs.

l'l. In a springcainniing machine a flexible camming element, a pair ofv horizontally one end'of the cammingrelement, andsetting means for said springs positioned forwardly of the anchored ends thereof.

I3. In a spring camming inacliine,'a fleX ible caifi'n'ning element ccnisi'sting of an intermediate portion and a pair of en'd portions, said: intermediate portion formed of aA series of vertical-ly disposed units each provided; oir

one face Withr a dove-tailed gi-oove,sai'd units oppositely' disposed and inter'en'ga'gi of' with i earn other7 andl each of said'end portions havlng' the inner' part thereof provided with means for interengaging with an outer unit of the intermediate' port-ion and its outer portion extended and provided with means for pivotal connection with a tensioning element therefor. i

I4. In a spring caniining machine, a. fil 2iible camming element, a platform errar V tlierebeloiv, a' pair of oppositelydisposed, horizontally extending tensioning elements arrangedY over the platform,v stationary anchoring means for the inner ends of saidV ten'- sioning elements, the endsvof said and the outer ends ofthe tensioning elements interengaging with each other, and means extending through said interengaging ends for pivotally connecting the eamniing element to the tensioning elements.'

l5; In a spring can'iming machine, a fier;- ible camming element, platform arranged therehelow, al pair of oppositely disposed, horizontally extending tensioning elements ,arranged over the platform, stationary anelioring means for the inner ends of said tensioning elements, the' ends of said caniming and .the outer ends of the tensioning elements interengaging With each other,

means extending. through said interengaging ends for pivotally connecting the camming element to the tensioning elements, and said platform provided with means to permit of selectively positioning said anchoring means.

16. In a spring cainming n'aohine, a ieX- l ihle eainn'ling element, a platfori'n arranged therebeloiv, apairv of oppositely disposed, horizontally extending tensioning elements arranged over the platform,V stationary anehoring` means for the inner ends of said tensioning elements,` the ones of said cainining andthe outer ends of the tensioning elements inte'rengaging with each other, means eX- tendingthrough said interengaging ends for pivotally. connect-ing` the -camming` element to the tensioning elements7V and means anchored on the platformfand positionedinproxiinity to theinner sides ofl said tensioning elements for setting these latter. y i

In testimony whereof, I affix-my signature hereto.

JOHN IV. KILIINGSWCRTH.

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